The utility model belongs to the field of machinery automatic engineering and particularly relates to a moving seam expanding robot applied to environments such as ruins and caves. The moving seam expanding robot comprises a robot box body, front swinging arms, rear swinging arms, a seam expanding executing mechanism, a front swinging arm driving mechanism, a rear swinging arm driving mechanism, robot driving mechanisms and a seam expanding control mechanism. The two sides of the robot box body are symmetrically provided with the robot driving mechanisms which are used for driving the seam expanding robot to integrally move. The two sides of the front end of the robot box body are symmetrically provided with the front swinging arms and the front swinging arms on the two sides are synchronously rotated through the front swinging arm driving mechanism installed in the robot box body. The rear swinging arms are symmetrically arranged on the two sides of the rear end of the robot box body. The rear swinging arms on the two sides are synchronously rotated through the rear swinging arm driving mechanism in the robot box body. The seam expanding robot can cross an obstacle and adjusting the seam expanding angle through rotation of the front swinging arms and the rear swinging arms. The moving seam expanding robot can be applied to complex environment conditions such as the ruins and the caves, the initial seam expanding height can be adjusted and the robot has the advantages of being flexible in movement, wide in application range and the like.